Comb



FIG. 1 is a front elevation of a comb showing my new design, the rear being a mirror image;

FIG. 2 is a top plan view;

FIG. 3 is a bottom plan view;

FIG. 4 is a left side elevation taken from the left of FIG. 1; and

FIG. 5 is a right side elevation taken from the right of FIG. 1. 

The ornamental design for a comb, as shown and described. 